Water-heater



No. 609,357. Patented Aug. I6, |898. P. LINDEMEYR.

WATER HEATER.

(Application filed Oct. 25, 1897.|

(No Model.)

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PHILIP LINDEMEYR, or BALTIMORE, MARYLAND.

WATER-HEATER.

SPECIFICATION forming part of Letters Patent No. 609,357, dated August 16, 1898.

Appiicaiion inea; ociober 25, 1897. sei-iai Naseem. (No man.)

as will enable others skilled in the art to which it pertains to make and use the same.

The invention relates to water-heaters and its primary object is to" provide simple, eco nomical, and efficient means for heating water in bath-tubs.

The invention consists in the construction hereinafter described and pointed out.

In the accompanying drawings, Figure 1 is a vertical section of the heater. Fig. 2 is a plan.

Numeral l denotes a vessel or gas-stove of approximately elliptical form in horizontal section, having a central opening 2,which may be circular in cross-section, though such form is not essential. The stove may also have other forms; but it is preferably oblong.

3 denotes a water-tight cover for the stove, and below said coveris the combustion-chamber. This cover is by preference made concave on its under side to promote freer circulation of hot gases thereunder.

4 denotes a water-tight air-chamber provided with an air-inlet 5.

5 denotes a handlefixed to the top of the air-inlet and kept cool by inflowing air.

The air-inlet tube is kept cooler than the combustion-chamber by the water surrounding it, and this prevents overheating of the handle. The handle is situated remote from the combustion-exits and centrally with respect to them and the combustion-chamber, whereby it can at all times be safely and comfortably used.

The walls of the two chambers 1 and 4 are connected by short tubes or conduits 6 in such manner as to leave an open watercirculatin0iY space 7 between them.

8 denotes nuts adapted to crowd the top wall of the air-chamber against shoulders 9 on the connecting-tubes.

lO denotes a gas-supply pipe having a delivery-exit at 1l on a level with the center of air-inlets 12 and adapted to entrain airthrough said openings after the manner of the so-called Bunsen burners.

The pipe I3 is provided with wires 14. transverse to promote the. mixing of ythe gas and entrained air. Said pipe extends through the wall of the air-chamber and of the combustion-chamber and communicateslwith a continuous or ring burner 15, preferably of an approximately elliptical form. This -burner is conveniently made of a tube bent into suitable form', which is preferably oblong, and burner-openings are provided by narrow slits -16 cut in the tube.

17 denotes chimneys or exit-pipes for the products of combustion. Their lower ends open preferably ou a level with the burner` openings.

18 indicates a closed lighting-hole.

The chimneys and the air-inlet tube will in practical operation extend above the surface of the water to be heated. Water circulatesfreely between the walls of the air and combustion chambers and all around them, except that the air vessel constitutes the bottom ofA the structure and ordinarily rests on the bottom of the tub or receptacle the contents of which are to be heated.

A The air vessel not only supplies air to be ,mixed with gas in the pipe 13, but furnishes a subsidiary supply to the combustion-chamber through the conduits 6.l W i The separation of the air and combustion chambers substantially as indicated,whereby mixer and also increases the chimney-draft.

The air and gas mixer being placed in the tube 5 is separated by two walls from the burner and effectually precludes the burnerilame from running back to the mixer, as happens in prior gas-burnin g bath-heaters.

IOO

It is an incidental advantage in the construction whereby the air-chamber is kept cool that more air can be supplied to the burner within the restricted compass of the heater in consequence of its greater density.

It has been found by experiment that if the lower open ends of the chimneys terminate much above the burner-openings there is a considerable loss of heat by the too rapid escape of the products of combustion and that if they terminate much below said openings imperfect combustion and the production of soot and loss of heat result, and it has been demonstrated that the arrangement shown and described produces the best results.

By preference the outer wall of the combustion-chamber has extensions Ia approxil claim isl. In a heater adapted to be submerged in water, a burner, a combustion-chamber, an air-chamber separate from the combustionchamber and connected by a communicating conduit adapted to supply air to the burner, an air and gas mixer situated in the inlet to the air-chamber and connected to the burner by a conduit extending through the walls of the air-chamber and an intermediate waterspace and having a tight connection With said walls, and a chimney, said chambers being exposed to water on all sides and at all points except at the connecting-conduits, air-inlet, and chimney, substantially as described.

2. In a heater adapted to be submerged in water, a burner, a combustion-chamber, a

separate air-supply chamber communicating with the combustion-chamber through one or more connecting-tubes, said tubes holding the chambers apart, whereby an intermediate water-circulating space is produced, substantially as described.

3. In a heater adapted to be submerged in water, a burner, a combustion-chamber, a separate air-supply chamber communicating with the combustion-chamber through one or more connecting-tubes, said tubes holding the chambers apart, whereby an intermediate water-circulating space is produced, the airchamber serving as a supporting-base for the heater, substantially as described.

4. In a heater adapted to be submerged in water, the air-inlet pipe, the gas-supply pipe, the air and gas mixing tube 13 situated Within the air-inlet tube and separated from the air-inlet tube by a water-space, the combus tion-chamber, a burner, and a conduit connecting pipe I3 and the burner said conduit passing through the walls of the air-inlet and combustion-chamber and the intermediate water-space, substantially as described.

5. In a heater adapted to be submerged in water, the continuous combustion-chamber having an opening 2, the continuous ringburner, the air supply tube l5, a conduit whereby the combustion-chamber and the airsupply tube communicate, the gas-supply tube, and a chimney 'near' each end of the combustion-chamber, allin combination, substantially as described.

6. In a heater adapted to be submerged in water, the continuous water-tight combustion-chamber, the burner, the centrally-situated air-inlet tube 5 surrounded by a watercirculating space and centrally situated with respect to the combustion-chamber and its exits, a conduit whereby the air-inlet tube and the combustion-chamber communicate, and a handle attached to the upper end of said air-inlet tube, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscrib ing witnesses.

PHILIP LINDEMEYR.

Vitnesses:

F. D. BLAoKIsToNE, BENJ. R. CATLIN. 

